Hi Everyone,
Thanks for all the advice. Just got back from the barn and he seems fine, so far. I put him in the round pen last night, and believe me, he was not a happy camper this morning when I came to check on him. Trotting around and complaining loudly about the lack of feed. Gut sounds are still good, P&R nominally higher but I think due to being upset at being penned (he's used to roaming on 40 acres), poop a little softer than normal, but not significantly, and hooves seem a normal temp. I'm planning on keeping him in the round pen for a couple of days with light feedings of grass hay several times a day and plenty of fresh water. I think he's going to be okay. He's a pretty hardy horse (Appy/Arab X) and seems to have an iron stomach, but he is a bit older and you never know how they may react to something. I'm starting to feel better, too, so that will make it easier to keep an eye on him. Yesterday, I could hardly stay out of bed for three hours at a time without being exhausted, so I was feeling somewhat panicky about how I would manage if something happened (hubby & son barely know the front from the back of horses, so they're no help). Everything seems to have worked out okay, though. So thanks, everyone for your advice, and I will keep an eye out for signs of founder for the next few days.
Blessings,
Liz